Worship and service of Shri Vitdalnath ji was done every day in the home of Namdev ji. When Namdev ji was three years old, his father was to go somewhere. He asked Namdev ji to serve Vitdalnath ji and informed him that Shri Vitdalnath ji is owner of this house. It would be sin to take food without offering him first.
Then, Namdev ji asked the procedure. His father told him that he should get up early in the morning, take bath and prepare the food. Later, clean the feet of Shri Vitdalnath ji slowly so that it did not hurt him. After completing bath of Vitdalnath ji, decorate him. Ask him, which dress he would like to wear. After dressing him, offer him milk and food etc. The father advised Namdev that only after repeated request, Shri Vitdalnath ji takes the offerings.
Namdev ji was a small child. He could not sleep previous night. He got up at four o’clock in the morning to serve Vitdalnath ji. He did whatever, his father told him. He applied sandal paste on the forehead of Vitdalnath ji and offered milk to Vitdalnath ji. He prayed that he is almighty and looks after entire world. He is not in a position to offer anything. Whatever belongs to him, he is offering. Namdev ji requested repeatedly but Vitdalnath ji was continuously gazing him instead of drinking milk. Namdev ji again pleaded that he is child and never done his service earlier, hence he might be angry. Namdev ji kept requesting to drink milk. Namdev ji thought, milk might be less sweet. So he brought sugar and mixed in the milk.
Namdev ji told Vitdalnath ji, in case he did not drink milk, he would also renounce drinking milk and break his head in his feet. The child was very anxious. In case Vitdalnath ji did not drink milk, father would be angry. Namdev ji ultimately decided to break his head. As soon as he was going to break his head, Vitdalnath ji lifted the milk pot. Vitdalnath ji was joyous with the devotion of Namdev ji. Namdev ji was also happy. Namdev ji was expecting some milk left for him. But Vitdalnath ji was ready to drink entire milk. Namdev ji retorted what has happened today, whether he would drink entire milk. Listening this, Vitdalnath ji picked Namdev ji in his lap and then both exchanged milk for drinking.
Shrimad Bhagwat Mahapuran by Shri Ramchandra Keshav Dongra ji Maharaj